FROM alpine:3.18.0 AS builder

ARG DI_VER=1.2.5

RUN apk add --update --no-cache \
    build-base \
    make \
    curl

WORKDIR /app

# Build dumb-init
RUN curl -Lo - "https://github.com/Yelp/dumb-init/archive/refs/tags/v${DI_VER}.tar.gz" | tar -xzf - && \
    cd "dumb-init-${DI_VER}" && \
    make SHELL=/bin/sh && \
    mv dumb-init .. && \
    cd ..

COPY . ./

RUN make CFLAGS='-O3' LDFLAGS='-static -flto' && \
    strip build/lander && \
    readelf -d build/lander && \
    [ "$(readelf -d build/lander | grep NEEDED | wc -l)" = 0 ]


FROM busybox:1.36.1

RUN mkdir /data && \
    chown -R 1000:1000 /data

COPY --from=builder /app/build/lander /app/dumb-init /bin/

WORKDIR /data

USER 1000:1000

ENTRYPOINT ["/bin/dumb-init", "--"]
CMD ["/bin/lander"]